<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>图片的边框</title>
		<link rel="stylesheet" type="text/css" href="../css/SecondQuestionThree.css" />
	</head>
	<body>
		<!-- 第一层 -->
		<div class="bgb1">
			<!-- 1 -->
			<div class="img1">

			</div>
			<!-- 2 -->
			<div class="img2">

			</div>
			<!-- 3 -->
			<div class="img3">

			</div>
		</div>
		<!-- 第2层 -->

		<!-- 4 -->
		<div class="img4">

		</div>
		<!-- 5 -->
		<div class="img5">

		</div>
		<!-- 6-->
		<div class="img6">

		</div>
		</div>

	</body>
</html>
